When you say 2+dependent (including sponser).I just followed this link step by step....
https://www.canadavisa.com/canada-immigration-discussion-board/threads/how-to-link-an-application-to-cic-account-step-by-step-instruction.619724/
Make sure to enter 2+dependants (including sponsor) under the "Number of family members, including the primary applicant, that are part of this application" part....and only enter the Principal Applicant's details.
We dont have any children. Should I enter 2 or 3?